In a particular cathode-ray tube, the measured beam current is 50.0 μΑ. How many electrons strike...
In a cathode-ray tube, a beam of electrons (the cathode ray) is deflected in a region of electric field on its way to a fluorescent screen, as shown in the figure. Consider the parallel-plate arrangement in the figure, and assume that the electric field E = 400 N/C is uniform between the plates and that E = 0outside the plates. The beam of electrons is injected horizontally with velocity v0 = 5.0 × 106 m/s. If the width of the...
The picture tube in a particular television draws a current of 20 A. How many electrons strike the viewing screen every second?
In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.40 × 10−17 N during the first 2.60 cm of the tube’s length; then they move at essentially constant velocity another 45.0 cm before hitting the screen. (a)Find the speed of the electrons when they hit the screen. ___m/s (b)How long does it take them to travel the length of the tube? ___ns
An electron beam moves toward a cathode ray tube screen, which is 30 cm away from the negative electrode. The electrons are accelerated by a potential difference of 14 kV. Estimate the maximum displacement of the electron beam caused by Earth's magnetic field. The average magnetic field at the surface of Earth is roughly BE = 45×10−6T. answer with units
Q 11) An electron beam moves toward a cathode ray tube screen, which is 20 cm away from the negative electrode. The electrons are accelerated by a potential difference of 18 kV. Estimate the maximum displacement of the electron beam caused by Earth's magnetic field. The average magnetic field at the surface of Earth is roughly BE = 45×10^−6T. Express your answer with the appropriate units.
Q) The electron beam inside an old television picture tube is 0.40 mm in diameter and carries a current of 50 μA. This electron beam impinges on the inside of the picture tube screen. Part A How many electrons strike the screen each second? Ans: 3.1×1014 electrons Part B: What is the current density in the electron beam? Ans: J J = 400 Am2 Part C: The electrons move with a velocity of 3.6 ×107 m/s. What electric field strength...
Older televisions display a picture using a device called a cathode ray tube, where electrons are emitted at high speed and collide with a phosphorescent surface, causing light to be emitted. The paths of the electrons are altered by magnetic fields. Consider one such electron that is emitted with an initial velocity of 1.85 107 m/s in the horizontal direction when magnetic forces deflect the electron with a vertically upward acceleration of 5.45 1015 m/s2. The phosphorescent screen is a...
Older televisions display a picture using a device called a cathode ray tube, where electrons are emitted at high speed and collide with a phosphorescent surface, causing light to be emitted. The paths of the electrons are altered by magnetic fields. Consider one such electron that is emitted with an initial velocity of 2.05 x 10^7 m/s in the horizontal direction when magnetic forces deflect the electron with a vertically upward acceleration of 5.30 x 10^15 m/s2. The phosphorescent screen...
The electron that flies in the tube has energy of 12 keV. The cathode-ray tube is oriented so that the electrons move in a horizontal direction from the south to the north. Earth's magnetic field component B = 5.5 * 10-5T is facing downwards. In what direction will the electron beam be tilted? How big is the electron beam deflection x when the electrons in the tube have flown 20 cm?
The electron beam inside an old television picture tube is 0.40 mm in diameter and carries a current of 50 μA. This electron beam impinges on the inside of the picture tube screen. A) How many electrons strike the screen each second? B) What is the current density in the electron beam? C) The electrons move with a velocity of 3.2 ×10^7 m/s. What electric field strength is needed to accelerate electrons from rest to this velocity in a distance...